System for compressing air and extracting nitrogen from compress

Details System for compressing air and extracting nitrogen from compress System for compressing air and extracting nitrogen from compress

1994-07-01

1996-03-05

Spitzer, Robert

Gas separation

With nonliquid cleaning means for separating media

Solid agent cleaning member movingly contacts apparatus

96 4, 96111, 96113, 96117, B01D 35157, B01D 5322

Patent

active

054963885

ABSTRACT:
A system for extracting nitrogen from air to produce a flow of nitrogen includes a compressor for compressing air and an air separator connected to the compressor for producing nitrogen from the compressed air. The compressor is provided with a reducing device for reducing an effective length of the rotatable rotors which acts to compress air in order to cause the compressor to operate at less than full capacity. An internal pressure control regulator operatively associated with the compressor regulates the discharge pressure from the compressor and provides a signal air pressure when the compressor discharge pressure exceeds a predetermined pressure. An external input device allows an external signal indicative of a compressor operating level that is less than full capacity to be inputted and provides a signal air pressure based on the external signal. The reducing device is made operational either automatically on the basis of the signal air pressure from the internal pressure control regulator or manually on the basis of the signal air pressure from the external input control device. The system can also be designed to vary the operating level of the compressor when the purity of the nitrogen changes as a result of a change in the nitrogen flow demand.

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Brochure, "Praxair NitroGEN membrane system", Praxair Corporation, one page.
Gardner-Denver Brochure, Electra-Saver Rotary Screw Air Compressor, 13 pages, 1988.
Sullair Corporation Brochure, 150 & 200 HP Stationary Compressor, 4 pages, 1989.

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